Deep-well pump



June 30, 1925.

C. P. EISENHAU ER DEEP WELL PUMP Z5 Zbllxllllli qlllllllllfllflllllll v atto: nu,

Patented June 30, 1925.

UNITED STATES yELFECE.

CHARLES P. EISENHAUER, OF DAYTON, OHIO, ASSIGNOR TO THE DURO PUMP AND MANUFACTURING COMPANY, OF DAYTON, OHIO, A CORPORATION OF OI-IIO.

DEEP-WELL PUMP.

Application filed October 20, 1923. Serial No. 669,710.

To all whom it may concern.'

Be it known thatl, CHARLES P. EISEN- IIAUER, a citizen of the United States, residing at Dayton, in the county of lvlontgomery and State of Ohio, have invented certain new and useful Improvements in DeeplVell Pumps, of which the4 following is a specificatie My invention relates to pumps and more particularly to deep well pumps of the double acting and double displacement type.

`In the present construction, there'is contemplated a pump mechanism to be suspended at a low level within a well wherein 5 the water does not rise sufficiently high to be drawn bythe usual suction pump. The construction involves a pump cylinder connected to the lower end .oi the pump stock or well tube, within which cylinder reciprocates a single plunger or piston. rlhe cylinder is provided with a valved water inlet orifice at its lower end below the plunger or piston and is also provided `with a second valved water inlet orifice in the wall of the pump cylinder above the plunger or piston. On the rip-stroke the piston draws vwater through the valved inlet in the lower end ot the cylinder' and upon the downstroke it draws a charge of water through the lateral port in the cylinder wall above the piston.

These respective charges of water are displaced by the piston upon reversal of its direction ot movement. Each charge of water is forced by the displacement movement of the pump piston through an outlet from the respective compartments above and below the piston head into the water column or discharge pipe common to .both of the displacement chambers. The outlets from the respective chambers are controlled by independent` check valves. The outlet passage from the lower displacement chamber or that beneath the piston head or plunger to the common discharge pipe or water column is through the hollow stem of the piston or plunger and the corresponding check valve may be located either in the piston head or adjacent to the upper end of the cylinder 4or at the point ot' communication between the hollow piston rod and the common discharge pipe. The construction is shown embodied in both an open type and a closed type of pump cylinder mechanism. That is to say, in the open type the parts are sok constructed that the valve mounting and valves carried thereby are of smaller diameter than the inside of' the column or discharge pipe which permits all the valves to be withdrawn from the well by means of the plunger rod when repairs are required, without disturbing the water column or discharge pipe. To the contrary the closed type of' construction does not permit the withdrawal of the valve mounting but necessitatesthe removal of the entire discharge pipe of water column and cylinder to aiiord access to the valve. ln the open type construction, the invention involves improved means for seating and unseating the valve mountings which may be successfully operated by manipulation of the pump rod.

vThe object of the invention is to simplify the structure as well as the means and mode of operation of such deep well pumps whereby they will not only be cheapened in construction, but will be more efiicient in use, positive in operation, uni-form in action, of increased durability and unlikely to get out of repair.

A Jfurther object of the invention is to provide a pump having substantially double capacity of the usual single acting cylinder' of the same displacement when operated at similar speeds.

A further object of the invention is to provide such double acting deep well pump which willl deliver a continuous discharge o' substantially uniform volume on both the up and the down strokes.

further object ot `the invention is to provide a pump wherein the operation is a balanced one requiringr substantially lthe same power to depress the piston, that is required to elevate the piston, thereby adapting the pump Alfor power actuation. By providing such balanced construction wherein the resistance to the movement of the piston upon the up and down stroke is substantially equalized the intermittent power requirement and consequent jerking operation of the usual pump mechanism is eliminated.

Moreover, the present construction is so arranged that the weight of the piston and pump rod is compensated for by a slight variation of the water charges on the up and down strokes.

A 'further object of the invention is to provide such a construction which will be compact but easily accessible and to afford improved means for disfmgagingl the mechanism within the cylinder or removal and for reseating suchA pump parts by the manipulation of the pump rod without the necessity of withdrawing the discharge pipe or water column from the well.

lVith the above primary and other incidental objects in view as will more fully appear in the specification, the invent-ion consists of the features of construction, the parts and combinations thereof, and the mode of operation, orV their equivalents as Vhereinafter described and set forth in the claims.V 7 Y In the accompanying drawings wherein is shown the preferred but obviously not necessarily the only forms of the embodiment of the. invention, Fig. 1 is a longitudinal sectional view of the deep well pump mechanism forming the subject matter hereof embodied in an open type of construction wherein the parts are removable through the discharge pipe or water column`bymanipulation of the pump rod. Fig. v2 is a similar longitudinal sectional view of the pump cylinder showing the parts assembledin a closed type of construction involving such modifications of the mechanism particularly the location ofthe outlet check valve from the lower displacement chamber, which variation obviously can be embodied in the open type of construction illustrated in Fig. 1.

Like parts are indicated by similar characters ot' reference throughout the different views.

Referring to the drawings, 1is the water column or discharge pipe suspended in the well to the lower end of which is connected by means of an intermediate coupling section 2, the brass pump cylinder 3. Mounted for reciprocation within the cylinder 3 is a hollow plunger head or piston 4 provided with cup leather packing rings 5 and from which extends upwardly the hollow plunger stem or piston rod 6. At its upper end this hollow piston rod or stem 6 is interconnected by an open sided orpcage like coupling 7 with the reciprocatory pump rod 8. The

rod `8 is connected at its upper endto vany suitable actuating mechanism by which the` rod and plunger or piston may be reciprocated within the cylinder 3. It will be understood that the cylinder 3 is ordinarily censtructed of muchrgreater length than is indicated in the drawings wherein the cylin der is shown broken away. Thus the plunger or piston head 4 is enabled to reciprocate throughout a stroke of considerable length. At the lower end the cylinder 3 is provided with a fitting 9`which forms the intake for the cylinder upon the up-stroke of the piston. A valve seat 10` engages a tapered bore within the fitting l9 and receives an inlet check valve 11 seating thereon and enclosed within avalve cage 12 surrounding the valve 11 and having screw open end ofthe plunger head which stud carries a transverse pin 15 adapted t0 engage the upper edge of the valve cage 12 when the Vpiston head and pump rod are depressed to an abnormal extent. The normal range of movement of the piston head .or plunger 4 is such that the in 15 Awill not Contact the valve cage 12. owever, upon disconnecting the upper end of `the pump rod 8 the rod may be lowered to cause the transverse pin 15 to impinge upon the upper end of the cage 12 andfby repeated blows drive the valve cageintoxtight engagement in the fitting 9. To disengage the valve seat 10, the cage 12is provided with bayonet slots 16 into which the ends of the pin 15 may be lowered by Giving to the pump rod a partial rotation. Y. y lowering thek pump rodto pass the projecting ends of the pin 15 into the bayonet slots 16 and giving to the rod a partial rotation to effect their interengagement with the cage 12, the valve seat 10V with the valve 11 and cage 12 may be withdrawn as a single unit.

During normal operation.l the lower limit ot' the range of movement of thc piston head is such that there will be no interference nor engagement between the transverse pin 15 and the valve cage. Obviously, as the piston head or plunger 4 is drawn upward, a charge of water will be dra-*wn through the. inlet oriiice in the fitting 9 and past the inlet check valve 12 into the lower displacement chamber 17 beneath the plunger head. Upon the reversal of thestroke of the plunger head4, that is during .its down stroke the water drawn into the chamber 17 will be displaced by the piston head 4 upwardly through the interior of the head 4 and then the hollow stem or piston rod G and will be discharged past the check valve 18 in the hollow open sided coupling `7- at the upper end of the stem 6 and then into the water column or discharge pipe l leading upwardly to the discharge pump or other-water outlet from the. well. y

Located in the intermediate coupling section 2 between the discharge pipe 1 and cylinder k3 is a second valve cage or mounting supporting two independent check valves to wit. an annular inlet check valve 20 and a second discharge checkvalve 21. l The valve cage or mounting'. 19 is further provided with a packing gland 22 surrounding the Vhollow piston stem or rod 6 and through which such stem reciprocates. `This packing gland 22 has been shown provided with the `usual or ordinary form dunce cap packing.

However', other forms oi packing obviously may be substituted. The coupling section 2 is provided with a plurality of laterally disposed inlet orifices 23 exteriorly surrounded by a screen jacket 24. The inlet orifices 23 are controlled by the annular check valve 20. It is to be noted that the check valve 20 has an internal diameter somewhat greater than the external diameter of the stem or piston rod (S, and the valve seat 25 is similarly proportioned to y afford' a water passage 26 through which water entering through the inlet port 23 past the check valve 20 may be passed downwardly into the upper displacement chamber 27 located above the plunger head 4 and intermediate the head 4 and the valve mounting or cage 19.

Upon the down stroke of the plunger by which the charge of water is displaced from the chamber 17, a second charge of water is drawn into the upper chamber 27 through the inlet port 23 and past the valve 2O and through the passage 26. Thus the upper displacement chamber is being `iilled while the lower chamber is being emptied. Upon the reverse stroke or upward movement of the piston head l by which the charge of water is drawn into the lower displacement chamber 17, the charge of water already in the upper chamber 27 is displaced by the rise of the piston or plunger suoli body of water passing upwardly through thepasssage 26 and the interior of the annular valve 2O thence through the annular passage 28 in the mounting or cage 19 and past the discharge check valve 21 into the water column or discharge pipe 1 in which this charge intermingles with that discharged from the lower chamber 17 through the hollow stem 6 and past the check valve 18. The capacity of the upper and lower displacement chambers 27 and 17 is approximately the same except ior the volume in the upper chamber displaced the hollow stem or rod 6. This slight difference of water capacity tends to comn pensate for the weight of the pump rod and plunger head. Thusl on the down stroke when gravity due tothe weight of the pump rod or plunger supplements the power applied to the pump apparatus to expel the water from the chamber 17 approximately the same power effort is required to depress the plunger as is required upon the return stroke to lift the body of water within the chamber 27 against the pressure within the discharge pipe 1 with the added weight or gravity influence of the pump rod and plunger. Thus the resistance or the power requirement necessary to overcome the resistance is equalized in the opposite direction of movement of the plunger.

The cage 19 or mounting for the valves 20 and 21 has a tapered seating engagement in the coupling section 2 from which it may be dislodged for removal from the Well by the upward impact of the head 4 upon the lower end of such mounting or cage when the pump rod is raised to an abnormal height. Normally the plunger head4 4 does not engage the mounting or cage 19 at the upper limit ot its stroke. However, upon disconnection of the upper end oi' the pump rod and its elevation to an extreme height the mounting or cage 19 may be dislodged and lifted from the cylinder and through the discharge pipe 1 by the withdrawal of the pump rod and plunger. Upon the return of these parts to the well, the lower end of the coupling 7 may be made to impinge upon the head 29 of the valve mounting 19 to drive this mounting or cage 19 into engagement with its tapered seat in the coupling member 2. In its normal range of operation the coupling 7 does not descend at the lower limit of its travel into engagement with the head 29 of the mounting 19 but by turning the pump rod as before described into such position that the transverse pin 15 will enter within the bayonet slot 16 of the lowermost valve cage 12, the pump rod is permitted suiiicient play to enable the driving engagement ot the coupling 7 and head 29.

The closed type of construction illustrated in F 2 is substantially identical with that shown in Fig. 1 except the valve mountings or cages and seats are so interconnected in the structure that they cannot be removed without withdrawing the discharge pipe or water column and disassembling the structure. As a modification, there is shown in Fig. 2 a transposition of the outlet check valve from the lower chamber 17.

Obviously the pump cylinder as shown in Fig. 1 must be submerged in order that it may operate as a double action pump. There are installations, however, where the pump cylinder is set some distance above the water level and a suction pipe extending below'the water level is connected to the lower end of the cylinder. In order that the intake ports to the upper chamber may function under such circumstances, a jacket 30 is shown in Fig. 2 surrounding the cylinder and forming an annular water spaceJ with which the valved inlet ports at the upper end of the cylinder communicate. The annular space communicates at its lower end with the suction or supply pipe through a series of ports 31. Such water space thus becomes in ef- 'feet a continuation of the suction pipe supplying the intake valve at the top of the cylinder. The acket is intended for application also to the construction shown in Fig. 1.

From the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptibleof modification in its -torm, proportions,rdetail construction and arrangement et parts without departing from the principle involved or sacrificing any of its advantages. y

lVhile in order to comply with. the statute, the invention has been described in Vlanguage more or less specific as to structural features, it is to be understood that the invention is not limited tothe specific details shown, but that the means and construction herein disclosed comprises the preferred Ylorm of several modes oi. putting the invention into eli'ect and the invention is, therefore, claimed in any of its forms or modifi cations within the legitimate and valid scope oli' the appended claims.

Having thus described my invention, I claim: f

1. The combination with a doubleacting pump cylinder, of upper and lower inlet valve seats removably engaged in the cylinder and adapted to be upwardly displaced, a plunger' piston operating within the cylinder between the valve seats, both valve seatsV being engageable with the plunger piston 'for elevation out of the cylinder by abnormal movement of the plunger, said plunger being engageable with each of the valve seats independent of the other for drix'fing said valve seats into engagement with the cylinder. v

f The combination with a pump cylinder and upwardly displaceable upper and lower valve seats removably"mounted in the cylinder, of a plunger piston operating within the cylinder intermediate the upper and lower displaceable valve seats, and engageable with both valve seats for lifting them from and reengaging them in the cylinder, said plunger piston impinging upon abnormal down stroke upon one of said valve seats when in one position of revoluble adjustment, and when in a different position of revoluble Vadjustment impinging upony the other oi the. valve seats to d ive'r said valve seats into engagement with the 'cylinder,

3. The combination with a pump'cylinder and upwardly displaceable upper andlower `valve seats removably mounted in the cylinder, ot a plunger piston operating within the cylinder intermediate the upper and lower displaceable valve seats, and engageder, of a plunger piston operating withilr the cylinder intermediate the upper and lower displaceable valve seats,` and engageablewith both valve seats lor lifting them from and reengaging them in the` Cylinder,

said plunger piston being engageable with s,

first one and then the other of said valve seats upon partial rotation of the plunger piston.

v 5. The combination with a pump cylinder and upwardly displaceable upper and lower valve seats removably mounted in the cyl inder, of a plunger piston operating within the cylinder intermediate` the upper and lower displaceable valve seats andengage able with both valve seats for lifting them from and reengaging them in the cylinder, andmeans for eiiecting such replacement engagement ot thevalve seats singly.

6, The combination with a pump cylinder and upwardly displaceable upper and lower valve seats removably mounted in the cylinder, of a plunger piston operating within the cylinder intermediate the upper and lower valve seats, and means Jfor operatively engaging the piston plunger with either of the valve seats independent ot the other upon abnormally extended down stroke of the plunger piston.

7. The combinationwitli a pump cylinder and upwardly displaceable upper and lower valve seats removably mounted in the cylinder, ot a plunger piston operating within the cylinder intermediate the upper and lower valve seats and means for operatively engaging the piston plunger with either of the valve seats independent of the other, such engagement being` controlled by partial rotation oi' the plunger piston.

. In testimony whereof, I have hereuntoset my han'd'this 5th day of October AVD. 192B. y Y Y CHARLES P. EISENHAUER.

' Witnesses C. E. BUnNn'r'r, C. N. K'UEBLER. 

